E04F 2201/02
Non-undercut connections
Official title: Non-undercut connections, e.g. tongue and groove connections
E04F2201/02 (Non-undercut connections) appears on 1,074 US grants and 1,359 published applications in this corpus.
Search patents in E04F- Granted patents
- 1,074
- Published applications
- 1,359
- Assignees
- 322
- Inventors
- 883
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 2 |
| 2002 | 12 | 24 |
| 2003 | 16 | 40 |
| 2004 | 18 | 47 |
| 2005 | 22 | 29 |
| 2006 | 15 | 56 |
| 2007 | 6 | 39 |
| 2008 | 18 | 56 |
| 2009 | 30 | 32 |
| 2010 | 63 | 26 |
| 2011 | 31 | 29 |
| 2012 | 33 | 24 |
| 2013 | 41 | 43 |
| 2014 | 36 | 45 |
| 2015 | 45 | 53 |
| 2016 | 62 | 64 |
| 2017 | 53 | 64 |
| 2018 | 43 | 61 |
| 2019 | 57 | 59 |
| 2020 | 63 | 81 |
| 2021 | 43 | 75 |
| 2022 | 58 | 74 |
| 2023 | 62 | 87 |
| 2024 | 71 | 91 |
| 2025 | 85 | 95 |
| 2026 | 49 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E04F 2201/023With a continuous tongue or grooveIndexing code767
- E04F 2201/026With rabbetsIndexing code267
- E04F 2201/021With separate protrusionsIndexing code127
- E04F 2201/025With tongue and grooves alternating transversally in the direction of the thicknessIndexing code93
- E04F 2201/028Connected by tongues and grooves with triangular shapeIndexing code28
- E04F 2201/027Connected by tongues and grooves, the centerline of the connection being inclinedIndexing code27
Recent patents
- Methods for manufacturing a decorative panel, and decorative panels6 Oct 2026US 12,752,570 B2Unilin BV
- Panel, covering, and method of uncoupling two interconnected panels6 Oct 2026US 12,753,613 B2i4F Licensing NV
- Panel, covering, and method for manufacturing such a panel29 Sep 2026US 12,747,594 B2i4F Licensing NV
- Decorative panel and method of producing such a panel29 Sep 2026US 12,747,595 B2i4F Licensing NV
- Wall or floor panel with locking means suitable for herringbone-pattern installation22 Sep 2026US 12,742,329 B2Surface Technologies GmbH & Co. KG
- Decorative panel and method to make such decorative panel8 Oct 2026US 2026/0308382 A1Unilin BV
- Panels, method for manufacturing panels, mixture and lacquer8 Oct 2026US 2026/0308391 A1Unilin BV
- Building panels comprising a locking system8 Oct 2026US 2026/0308917 A1Välinge Innovation AB
- Panel for forming a covering8 Oct 2026US 2026/0308919 A1Unilin BV
- Floor panel8 Oct 2026US 2026/0308921 A1Unilin BV
Most cited
By later US patents
- Floor panel with edge connectors696US 6,006,486 AUnilin Beheer B. V., besloten vennootschap · 1999
- Panel and fastening system for panels495US 6,505,452 B1Akzenta Paneele + Profile GmbH · 2003
- Flooring material, comprising board shaped floor elements which are intended to be joined vertically469US 6,647,690 B1Pergo (Europe) AB · 2003
- Flooring material434US 6,591,568 B1Pergo (Europe) AB · 2003
- Floor panel with edge connectors411US 6,490,836 B1Unilin Beheer B. V., besloten vennootschap · 2002